Cobb replies to students:
student 1 (MP4)
student 2 (MP4)
student 3 (MP4)
student 4 (MP4)
student 5 (MP4)
student 6 (MP4)
student 7 (MP4)
student 8 (MP4)
student 9 (MP4)
student 10 (MP4)
student 11 (MP4)
student 12 (MP4)
student 13 (MP4)
student 14 (MP4)
student 15 (MP4)
student 16 (MP4)